65917 has 4 divisors (see below), whose sum is σ = 68220. Its totient is φ = 63616.

The previous prime is 65899. The next prime is 65921. The reversal of 65917 is 71956.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47961 + 17956 = 219^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 65917 - 2⁷ = 65789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108 + ... + 1165.

It is an arithmetic number, because the mean of its divisors is an integer number (17055).

2⁶⁵⁹¹⁷ is an apocalyptic number.

It is an amenable number.

65917 is a deficient number, since it is larger than the sum of its proper divisors (2303).

65917 is a wasteful number, since it uses less digits than its factorization.

65917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302.

The product of its digits is 1890, while the sum is 28.

The square root of 65917 is about 256.7430622237. The cubic root of 65917 is about 40.3954525483.

It can be divided in two parts, 659 and 17, that added together give a palindrome (676).

The spelling of 65917 in words is "sixty-five thousand, nine hundred seventeen".